Google's Ajax APIs[3] let a developer implement rich, dynamic websites entirely in JavaScript and HTML. A developer can create a map to a site, a dynamic search box, or download feeds with just a few lines of JavaScript.

The AdSense and AdWords APIs, based on the SOAP data exchange standard, allow developers to integrate their own applications with these Google services. The AdSense API allows owners of websites and blogs to manage AdSense sign-up, content and reporting, while the AdWords API gives AdWords customers programmatic access to their AdWords accounts and campaigns.

Google App Engine lets developers run web applications on Google's infrastructure. Google App Engine supports apps written in several programming languages. With App Engine's Java[citation needed] runtime environment, one can build their app using standard Java technologies, including the JVM, Java servlets, and the Java programming language—or any other language using a JVM-based interpreter or compiler, such as JavaScript or Ruby. App Engine also features a dedicated Python runtime environment, which includes a fast Python interpreter and the Python standard library.

Google Plugin for Eclipse (GPE) is a set of software development tools that enables Java developers to design, build, optimize, and deploy cloud computing applications. GPE assists developers in creating complex user interfaces, generating Ajax code using the Google Web Toolkit, optimizing performance with Speed Tracer,[4] and deploying applications to Google App Engine. GPE installs into the Eclipse integrated development environment (IDE) using the extensible plugin system.[5] GPE is available under the Google terms of service license.[6]

Google previously ran a project hosting service called Google Code[9] that provided revision control offering Subversion, Mercurial[10] and Git[11] (transparently implemented using Bigtable as storage), an issue tracker, and a wiki for documentation. The service was available and free for all OSI-approved Open Source projects (as of 2010, it was strongly recommended but no longer required to use one of the nine well-known open source licenses: Apache, Artistic, BSD, GPLv2, GPLv3, LGPL, MIT, MPL and EPL). The site limited the number of projects one person could have to 25.[12] Additionally, there was a limit on the number of projects that could be created in one day, a 200 MB default upload file size limit, which could be raised, and a 5 GB per-project total size limit.[13] The service provided a file download feature, but on May 2013 the creation of new downloads was disabled, with plans to disable it altogether on January 14, 2014.[14] In March 2015, Google announced that it would be closing down Google Code on January 15, 2016.[15] All projects on the site entered read-only mode on August 24, 2015,[16] with the exception of certain Google-owned projects including Android and Chrome.[15]

Error message seen by someone attempting to access code.google.com from an OFAC-restricted country.

Residents of countries on the United States Office of Foreign Assets Control sanction list, including Cuba, Iran, North Korea, Sudan and Syria, are prohibited from posting to or accessing Google Code.[17]

Gears was beta software offered by Google to enable offline access to services that normally only work online. It installed a database engine, based on SQLite, on the client system to cache data locally. Gears-enabled pages used data from this local cache rather than from the online service. Using Gears, a web application may periodically synchronize the data in the local cache with the online service. If a network connection is not available, the synchronization is deferred until a network connection is established. Thus Gears enabled web applications to work even though access to the network service is not present. Google announced the end of Gears development on March 11, 2011, citing a shift of focus from Gears to HTML5.[18]

Google Developer Groups[19] (GDGs) are for developers who are interested in Google's developer technology. A GDG can take many forms—from just a few people getting together, to large gatherings with demos and tech talks, to events like code sprints and hackathons. As of March 2015, there are currently 600+ GDGs worldwide.